201985792579 has 2 divisors, whose sum is σ = 201985792580. Its totient is φ = 201985792578.

The previous prime is 201985792493. The next prime is 201985792601. The reversal of 201985792579 is 975297589102.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 201985792579 - 2⁹ = 201985792067 is a prime.

It is a super-2 number, since 2×201985792579² (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 201985792579.

It is not a weakly prime, because it can be changed into another prime (201985792079) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100992896289 + 100992896290.

It is an arithmetic number, because the mean of its divisors is an integer number (100992896290).

Almost surely, 2^201985792579 is an apocalyptic number.

201985792579 is a deficient number, since it is larger than the sum of its proper divisors (1).

201985792579 is an equidigital number, since it uses as much as digits as its factorization.

201985792579 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 28576800, while the sum is 64.

The spelling of 201985792579 in words is "two hundred one billion, nine hundred eighty-five million, seven hundred ninety-two thousand, five hundred seventy-nine".